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Forearm-finger skin temperature gradient as an index of cutaneous perfusion during steady-state exercise
KTH, School of Technology and Health (STH), Environmental Physiology (Closed 20130701).ORCID iD: 0000-0002-7440-2171
2013 (English)In: Clinical Physiology and Functional Imaging, ISSN 1475-0961, E-ISSN 1475-097X, Vol. 33, no 5, p. 400-404Article in journal (Refereed) Published
Abstract [en]

The purpose of this study was to examine whether the forearm-finger skin temperature gradient (Tforearm-finger), an index of vasomotor tone during resting conditions, can also be used during steady-state exercise. Twelve healthy men performed three cycling trials at an intensity of similar to 60% of their maximal oxygen uptake for 75min separated by at least 48h. During exercise, forearm skin blood flow (BFF) was measured with a laser-Doppler flowmeter, and finger skin blood flow (PPG) was recorded from the left index fingertip using a pulse plethysmogram. Tforearm-finger of the left arm was calculated from the values derived by two thermistors placed on the radial side of the forearm and on the tip of the middle finger. During exercise, PPG and BFF increased (P<0.001), and Tforearm-finger decreased (P<0.001) from their resting values, indicating a peripheral vasodilatation. There was a significant correlation between Tforearm-finger and both PPG (r=-0.68; P<0.001) and BFF (r=-0.50; P<0.001). It is concluded that Tforearm-finger is a valid qualitative index of cutaneous vasomotor tone during steady-state exercise.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2013. Vol. 33, no 5, p. 400-404
Keywords [en]
finger blood flow, skin circulation, thermoregulation, validity, vasomotor tone
National Category
Physiology
Identifiers
URN: urn:nbn:se:kth:diva-123076DOI: 10.1111/cpf.12043ISI: 000321963000011Scopus ID: 2-s2.0-84880699152OAI: oai:DiVA.org:kth-123076DiVA, id: diva2:624449
Note

QC 20130813

Available from: 2013-05-31 Created: 2013-05-31 Last updated: 2018-01-11Bibliographically approved

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